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Interplanetary scintillation signatures in the inner heliosphere of the deepest solar minimum in the past 100 years

Published online by Cambridge University Press:  18 July 2013

Susanta Kumar Bisoi
Affiliation:
Physical Research Laboratory, Astronomy & Astrophysics Division, Ahmedabad 380 009, India email: susanta@prl.res.in
P. Janardhan
Affiliation:
Physical Research Laboratory, Astronomy & Astrophysics Division, Ahmedabad 380 009, India email: susanta@prl.res.in
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Abstract

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We have used interplanetary scintillation (IPS) observations at 327 MHz spanning years 1983-2009 to study microturbulence levels in the inner heliosphere. We find that the microturbulence levels show a steady and significant drop in the entire inner heliosphere starting from around 1995. The fact that the solar polar fields have also shown a similar declining trend provides a consistent result showing the buildup to the solar minimum between the solar cycles 23 and 24, the deepest in the past 100 years, actually began more than a decade earlier.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2013 

References

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